J/A+A/412/447ivo://CDS.VizieR/J/A+A/412/447doi:10.26093/cds/vizier.34120447CDSGerbaldi M.Faraggiana R.Lai O.2017-09-22T16:16:24Z2004-04-03T21:13:02ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frspectroscopic-binary-starsvariable-starsradial-velocityWe demonstrate that it is arduous to define the {lambda} Boo stars as a class of objects exhibiting uniform abundance peculiarities which would be generated by a mechanism altering the structure of their atmospheric layers. We collected the stars classified as {lambda} Boo up to now and discuss their properties, in particular the important percentage of confirmed binaries producing composite spectra (including our adaptive optics observations) and of misclassified objects. The unexplained RV variables (and thus suspected binaries), the known SB for which we lack information on the companion, the stars with an UV flux inconsistent with their classification, and the fast rotating stars for which no accurate abundance analysis can be performed, are also reviewed.2003A&A...412..447Ghttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/412/447CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicerelated-toV/50 : Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)J/A+A/381/105 : Rotational velocities of A-type stars. I. (Royer+, 2002)J/A+A/393/897 : Rotational velocities of A-type stars II. (Royer+, 2002)J/ApJS/99/135 : A-type stars rotation and spectral peculiarities (Abt+ 1995)J/A+AS/122/51 : B to G stars calibration in Geneva photometry (Kunzli+, 1997)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/412/447https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/412/447http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/412/447https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/412/447https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/412/447http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/412/447GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/A+A/412/447/table4 (Radial velocity and notes given in the BSC (Cat. <V/50>) and projected rotational velocities (vsini) from various sources.)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/412/447/table4?https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/412/447/table4?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/412/447/table4?GETtext/xml+votable180.050000true1.29065945.2290290.0055555555555555566/172 408 451 666 811 1885 1989 2675 2731 2747 2872 3377 3420 3810 4115 4277 4858 5171 5253 5311 5318 5428 5446 5608 5781 5872 6442 7269 7504 8494 8790 9310 9995 10459 10695 10804 10900 10990 12918 13001 13646 13723 13992 14224 14640 14652 15437 16104 16204 16543 16629 16703 17112 19099 19329 20125 20184 21399 21439 21538 22850 22852 22861 22884-22885 23001 23040 23375 23408 23637 23662 23785 23898 24404 24839 25455 25963 26310 26434 26446 27577 27735 27906 27909 28172 28486 28518 28737 28994 29086 29428 29519 30221 30229 30261 30467 30507 30851 31284 31928 32202 33469 34680 35104 35132 35823 36149 36298 37758 38238 38812 39263 40029 41424 41427 41613 42328 42375 42421 42618 43481 43557 44258 44499 45835 46138 46979 47110 47409 47520 47760 47876 48299https://cdsarc.cds.unistra.fr/viz-bin/moc/J/A+A/412/447?format=asciiOpticaldefaultJ/A+A/412/447/table4Radial velocity and notes given in the BSC (Cat. <V/50>) and projected rotational velocities (vsini) from various sources.recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHR? HR (Cat. <V/50>) numbermeta.idintnullablen_HR[*] Note (1)meta.notecharHDHD (Cat. <III/135>) numbermeta.id;meta.mainintprimaryRV? Radial velocitykm/sphys.veloc;pos.heliocentricintnullableNoteNotes from BSC (Cat. <V/50>) (2)meta.notecharVrot? vsini form Royer et al., (2002, Cat. <J/A+A/381/105> and <J/A+A/393/897>km/sphys.veloc.rotatintnullableu_VrotUncertainty flag on VRmeta.code.errorcharVAM? vsini from Abt & Morrell, 1995, Cat. <J/ApJS/99/135>km/sphys.veloc.rotatintnullableu_VAMUncertainty flag on VAMmeta.code.errorcharl_VUF[<= ] Limit flag on VUFmeta.code.errorcharVUF? vsini from Uesugi & Fukuda, 1982, Revised Catalogue of Stellar Rotational Velocitieskm/sphys.veloc.rotatintnullableu_VUF[:] Uncertainty flag on VUFmeta.code.errorcharn_VUF[*] *: UF gives this value for HD 11502.meta.notecharl_VHR[<= ] Limit flag on VHRmeta.code.errorcharVHR? vsini from BSC/CDS (<V/50>)phys.veloc.rotatintnullableu_VHRUncertainty flag on VHRmeta.code.errorcharSimbadSimbad column added by the CDSmeta.refchar_RARight Ascension (J2000) from SIMBAD (not part of the original data)degpos.eq.ra;meta.main_DEDeclination (J2000) from SIMBAD (not part of the original data)degpos.eq.dec;meta.mainJ/A+A/412/447/table5*Reddening, atmospheric parameters and distance in parsec computed from the Hipparcos parallaxesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintHDHD numbermeta.id;meta.mainintRem1Remark from the Hauck & Mermilliod Catalogue (1998, Cat. <II/215>) (1)meta.notecharE(b-y)? Reddeningmagphot.color.excessfloatnullableTeff? Effective temperature computed with the Moon & Dworessky (1985MNRAS.217..305M, MD) programme according to the value of the groupKphys.temperature.effectiveintnullablelogg? Surface gravity computed with the MD programme according to the value of the grouplog(cm.s**-2)phys.gravityfloatnullableGr? Group value (MD, 1985MNRAS.217..305M)meta.idintnullableTeffG? Effective temperature computed with the Kunzli et al. (1997, Cat. <J/A+AS/122/51>) programmeKphys.temperature.effectiveintnullableloggG? Surface gravity computed with the Kunzli et al. (1997, Cat. <J/A+AS/122/51>) programmelog(cm.s**-2)phys.gravityfloatnullable[M/H]? Metallicitylog(Sun)phys.abund.FefloatnullableRem2Remarks from Geneva photometry (1)meta.notecharDist? Distancepcpos.distanceintnullableUVCatUV flux category (3)phot.flux;em.UVchar